// ============================================================================
//
// Copyright (C) 2006-2007 Dengues
//
// Google Group: http://groups.google.com/group/dengues
// QQ Group: 24885404
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
//
// ============================================================================
package org.dengues.designer.ui.database.policies;

import org.dengues.designer.ui.database.commands.DBColumnCreateCommand;
import org.dengues.model.database.DBColumn;
import org.dengues.model.database.DBTable;
import org.eclipse.gef.EditPart;
import org.eclipse.gef.EditPolicy;
import org.eclipse.gef.Request;
import org.eclipse.gef.commands.Command;
import org.eclipse.gef.editpolicies.LayoutEditPolicy;
import org.eclipse.gef.editpolicies.NonResizableEditPolicy;
import org.eclipse.gef.requests.CreateRequest;

/**
 * Qiang.Zhang.Adolf@gmail.com class global comment. Detailled comment <br/>
 * 
 * $Id: Dengues.epf 1 2006-09-29 17:06:40Z qiang.zhang $
 * 
 */
public class DBTableLayoutEditPolicy extends LayoutEditPolicy {

    /*
     * (non-Javadoc)
     * 
     * @see org.eclipse.gef.editpolicies.LayoutEditPolicy#getCreateCommand(org.eclipse.gef.requests.CreateRequest)
     */
    @Override
    protected Command getCreateCommand(CreateRequest request) {
        Object newObject = request.getNewObject();
        if (newObject instanceof DBColumn) {
            return new DBColumnCreateCommand((DBTable) getHost().getModel(), request);
        }
        return null;
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.eclipse.gef.editpolicies.LayoutEditPolicy#createChildEditPolicy(org.eclipse.gef.EditPart)
     */
    @Override
    protected EditPolicy createChildEditPolicy(EditPart child) {
        EditPolicy result = child.getEditPolicy(EditPolicy.PRIMARY_DRAG_ROLE);
        if (result == null) {
            result = new NonResizableEditPolicy();
        }
        return result;
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.eclipse.gef.editpolicies.LayoutEditPolicy#getMoveChildrenCommand(org.eclipse.gef.Request)
     */
    @Override
    protected Command getMoveChildrenCommand(Request request) {
        return null;
    }

}
